I have had a tire totally self-destruct within the last decade, so I feel like I still need a spare. I don't believe that once a tire is damaged at speed the cans of sealant are likely to work, since it will probably tear apart.

I also have AAA, and don't intend to change a tire if I don't have to, but AAA will not provide you with a suitable tire and wheel. And I don't see why someone would want to arrange for their life to depend on their cell phone working if they drive anywhere out of town.

In fact, right now, I have run-flat tires, a spare, and AAA.